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Fencer Intel
high 7.2

CVE-2021-40469 json

Windows DNS Server Remote Code Execution Vulnerability

published 5y ago modified 4mo ago also EUVD-2021-27646

cvss
7.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
7.6%
EPSS 7.6% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

Windows DNS Server Remote Code Execution Vulnerability

Patch / fix

  • Microsoft Windows Server 2019 10.0.17763.2237
  • Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.2237
  • Microsoft Windows Server 2022 10.0.20348.288
  • Microsoft Windows Server version 2004 10.0.19041.1288
  • Microsoft Windows Server version 20H2 10.0.19042.1288
  • Microsoft Windows Server 2016 10.0.14393.4704
  • Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.4704
  • Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21251
  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.21251
  • Microsoft Windows Server 2008 Service Pack 2 6.0.6003.21251
  • Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.25740
  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.25740
  • Microsoft Windows Server 2012 6.2.9200.23490
  • Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.23490
  • Microsoft Windows Server 2012 R2 6.3.9600.20144
  • Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.20144

Is CVE-2021-40469 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

7.58% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
CNA 3.1 7.2 CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 6.5 AV:N/AC:L/Au:S/C:P/I:P/A:P

Affected products

  • Microsoft Windows Server 2019
  • Microsoft Windows Server 2019 (Server Core installation)
  • Microsoft Windows Server 2022
  • Microsoft Windows Server version 2004
  • Microsoft Windows Server version 20H2
  • Microsoft Windows Server 2016
  • Microsoft Windows Server 2016 (Server Core installation)
  • Microsoft Windows Server 2008 Service Pack 2
  • Microsoft Windows Server 2008 Service Pack 2 (Server Core installation)
  • Microsoft Windows Server 2008 Service Pack 2
  • Microsoft Windows Server 2008 R2 Service Pack 1
  • Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation)
  • Microsoft Windows Server 2012
  • Microsoft Windows Server 2012 (Server Core installation)
  • Microsoft Windows Server 2012 R2
  • Microsoft Windows Server 2012 R2 (Server Core installation)

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.